Importance of . (period)
whenever I look at mails from my friends, most of them compose mails without period after completing a sentence. Even if mails meant for friendly discussion or something, we should not neglect the importance of period. It will give good appeal to the reader. Many of my friends used to send mails like this:

Hi ra...
How are you...
here v r njoying a lot...
no mails from you...
bye..
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Hi ra..
How r u?.. I am coming to bombay this weekend.. ok then catch u later...
bye
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This is simply because of some kind of lazyness in composing mails or may be "... " indicates a short break in conversation. Yes right!! A short break in conversation.